1142021031 has 4 divisors (see below), whose sum is σ = 1522694712. Its totient is φ = 761347352.

The previous prime is 1142020991. The next prime is 1142021063. The reversal of 1142021031 is 1301202411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1142021031 - 2²² = 1137826727 is a prime.

It is a super-2 number, since 2×1142021031² = 2608424070492605922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1142021031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142021071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190336836 + ... + 190336841.

It is an arithmetic number, because the mean of its divisors is an integer number (380673678).

Almost surely, 2^1142021031 is an apocalyptic number.

1142021031 is a deficient number, since it is larger than the sum of its proper divisors (380673681).

1142021031 is an equidigital number, since it uses as much as digits as its factorization.

1142021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380673680.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1142021031 is about 33793.8016653942. The cubic root of 1142021031 is about 1045.2608892056.

Adding to 1142021031 its reverse (1301202411), we get a palindrome (2443223442).

The spelling of 1142021031 in words is "one billion, one hundred forty-two million, twenty-one thousand, thirty-one".